Rainbow
Rainbow Audio SL-M4 4 channel micro amplifier
SKU: SL-M4
$ 425.00
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Rainbow Audio SL-M4 4 channel micro amplifier
Regular price
$ 425.00
Sale price
$ 425.00
Regular price
$ 425.00
Unit price
Product Details
Specifications
Related Products
RAINBOW AUDIO SL‑M4 4‑Channel Micro Amplifier
Big system flexibility in a micro chassis
4‑Channel Class D
Micro Chassis
Bridgeable (2‑Channel)
Factory + Aftermarket Friendly
On Sale
What the SL‑M4 is built to do
The Rainbow Audio SL‑M4 is a compact 4‑channel micro amplifier designed for modern installs where space is limited but you still want clean power, strong control, and flexible system design. Use it to power a full front + rear setup, run a front stage with active crossovers upstream, or bridge channels for higher output when you want more authority from fewer speakers.
Power @ 4Ω (Stereo)
4 × 75W RMS
Power @ 2Ω (Stereo)
4 × 95W RMS
Power (Bridged)
2 × 180W RMS @ 4Ω
Size (L×W×H)
150 × 75 × 43 mm
Technical Specifications
| RMS Power | 4 × 75W @ 4Ω • 4 × 95W @ 2Ω • 2 × 180W @ 4Ω bridged |
| Input Sensitivity | 0.4V – 13V |
| Frequency Response | 5Hz – 25kHz |
| Signal‑to‑Noise Ratio | > 90 dB |
| Total Harmonic Distortion | < 0.2% |
| Dimensions (L×W×H) | 150mm × 75mm × 43mm |
| Part Number | 280003 |
Micro Amp, Full-System Use
Power four speakers, or bridge for two stronger channels. Great for compact builds that still need flexibility.
Wide Bandwidth
Designed for full-range clarity from low bass content to high-frequency detail.
Pro Tip: If you’re bridging channels, confirm speaker loads (4Ω minimum in bridged mode) and wiring before installation.
Sale Pricing
Sale Price
$199.99
Retail (Was)
$425.00
Value
Micro size • full flexibility
Best Uses
- 4-speaker upgrades: front + rear coaxials with solid RMS power.
- Front stage focus: components up front with rear fill, or bridge for higher-output front channels.
- Space-constrained installs: under-seat, behind-dash, glovebox, or side-panel mounting.
Quick Setup Tips
- Set gains conservatively, tune for clean output first, volume second.
- Use proper power/ground and fuse near the battery.
- Match speaker impedance correctly (especially if bridging).